Oxidation of iron at 400-600 °C in dry and wet O2
Artikel i vetenskaplig tidskrift, 2010

The oxidation of iron in dry and wet O-2 at 400-600 degrees C has been re-investigated using gravimetry, SEM/EDX, XRD and FIB. In the presence of O-2, water vapour accelerates iron oxidation at 500 and 600 degrees C. At 400 and 500 degrees C the magnetite layer is duplex and exposure to water vapour results in the formation of blades on top of a fine-grained hematite layer. At 600 degrees C it results in a surface without needles and blades. The increased oxidation rate at 500 and 600 degrees C is attributed to a smaller grain size in the hematite layer resulting in faster ion transport.

Oxidation kinetics of iron

Textured growth hematite

Water vapour

Void distribution

Författare

Bagas Pujilaksono

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Torbjörn Jonsson

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Mats Halvarsson

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Jan-Erik Svensson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Lars-Gunnar Johansson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Corrosion Science

0010-938X (ISSN)

Vol. 52 5 1560-1569

Ämneskategorier

Materialteknik

DOI

10.1016/j.corsci.2010.01.002